My flatmate’s weird bathroom habits are annoying

I live with a flatmate, she’s from Philippines, quite nice, quiet, etc. but sharing bathroom with her is a nightmare. She uses this small bucket to wash herself after going to the toilet, kind of like a simplified version of a bidet.

Now I don’t mind that, I know it’s more hygienic but the issue is she splashes so much when doing that, there are always puddles of water around the toilet seat and on the seat, and she also rinses that bucket in the sink where I brush my teeth and face, which I find slightly disgusting. I talked to her about it and she said she’ll be more mindful about the puddles but I can’t help being disgusted knowing that she is rinsing that in the sink.

Issue is, I can’t keep on telling her because honest almost every week I have to remind her about that, and other things, like leaving her public hair in the shower, and it’s getting exhausting so not sure what to do in this situation, how would you approach it?

EDIT: so many people misunderstood me. I didn’t mean that her washing her ass is the problem, I even said that I know it’s more hygienic, problem is the way she is doing it. I wouldn’t have an issue if she used a bidet or similar, my issue is dealing with puddles of water on the floor and toilet seat. Crazy how many people here can’t read with understanding: